Core
* [downloader/fragment] Set final file's mtime according to last fragment's
Last-Modified header (11718, 18384, 27138)
Extractors
+ [spreaker] Add support for spreaker.com (13480, 13877)
* [vlive] Improve extraction for geo-restricted videos
+ [vlive] Add support for post URLs (27122, 27123)
* [viki] Fix video API request (27184)
* [bbc] Fix BBC Three clip extraction
* [bbc] Fix BBC News videos extraction
+ [medaltv] Add support for medal.tv (27149)
* [youtube] Improve music metadata and license extraction (26013)
* [nrk] Fix extraction
* [cda] Fix extraction (17803, 24458, 24518, 26381)